53405399 has 2 divisors, whose sum is σ = 53405400. Its totient is φ = 53405398.

The previous prime is 53405357. The next prime is 53405459. The reversal of 53405399 is 99350435.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53405399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53405299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26702699 + 26702700.

It is an arithmetic number, because the mean of its divisors is an integer number (26702700).

Almost surely, 2^53405399 is an apocalyptic number.

53405399 is a deficient number, since it is larger than the sum of its proper divisors (1).

53405399 is an equidigital number, since it uses as much as digits as its factorization.

53405399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 53405399 is about 7307.8997666908. The cubic root of 53405399 is about 376.5838762186.

The spelling of 53405399 in words is "fifty-three million, four hundred five thousand, three hundred ninety-nine".